Yimei

She is Wolf's biological sister, but she does not know her brother's subsequent fate, as her mother left home with her soon after her birth.
She used her good looks to work as a model as a child to help support her family's finances.
She was drugged and raped by Mingfung, the head of the Over Heaven Society, at a reception for the Hong Kong police held by the Over Heaven Society and the Dark Tiger.
She consulted Yvet through her friend Charlene, which led to the resolution of the case.
Since then, Yvet has been helping her to deal with stalkers and other problems.
Because of her professional background, she knows many celebrities, so she invited Yvet to the Happy Valley Racecourse's booth for horse owners through her contacts.
Yvet then shot Song An from the booth.